<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            background: rgb(57, 62, 74);
            display: flex;
            justify-content: center;
        }

        .a {
            position: absolute;
            top: 60px;
            width: 520px;
            height: 520px;
        }

        .a span {
            position: absolute;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
            background: rgb(100, 100, 90);
            border-radius: 50%;

            top: calc(var(--i)*40px);
            left: calc(var(--i)*40px);
            bottom: calc(var(--i)*40px);
            right: calc(var(--i)*40px);
            box-shadow: inset 0 0 50px rgba(0, 0, 0, .5), inset 0 0 100px #000;
            animation: a 3s infinite cubic-bezier(0.7, -0.3, 0.3, 1.4);
            animation-delay: calc(var(--i)*0.07s);
        }

        .a span::after {
            content: 'GOAT/CSY';
            font: 900 80px '';
            color: blanchedalmond;
        }

        @keyframes a {
            0% {
                transform: rotateZ(0deg);
            }

            100% {
                transform: rotateZ(360deg);
            }
        }
    </style>

<body>
    <div class="a">
        <span style="--i:1"></span>
        <span style="--i:2"></span>
        <span style="--i:3"></span>
        <span style="--i:4"></span>
        <span style="--i:5"></span>
    </div>
</body>

</html>